Conceptual art object by vtol is a police truncheon that sends a text message each time it is used by force:
This device is a police truncheon equipped with a GSM-module which
sends a short phone message with the text “Mom, I hit a man” every time
when someone uses it to hit people. The number of addressee is fixed in
the code of the program and can’t be changed.
The idea of the project is to create a device which strictly controls
the cruelty of police. As all the standard methods of control are
ineffective, this project suggests the maternity as the last stronghold
of human kindness and responsibility.